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18 June 2014 Fiber laser strain sensor based in the measurement of a Sagnac interferometer optical power spectrum
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Abstract
In this paper a linear cavity Erbium doped fiber (EDF) laser based in a fiber Bragg grating (FBG) and a fiber optical loop mirror with a high birefringence fiber in the loop (Hi-Bi FOLM) is used as a strain sensor. The Fabry-Perot cavity is formed by the FBG and the Hi-Bi FOLM, used as a measurement system of strain variations produced on the FBG, used as a strain sensor device. Usually, fiber laser sensor experimental setups determine the measured variable magnitude by using of an optical spectrum analyzer (OSA). Hi-Bi FOLM transmission spectrum wavelength displacement by fiber loop temperature variations measurement can be an attractive application exploiting the characteristics of FOLM transmission spectrum behavior due to Hi-Bi fiber loop temperature variations to determine the FBG strain applied through the maximal optical power monitoring by simple use of a photodetector and a temperature meter.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Durán Sánchez, R. I. Álvarez Tamayo, O. Pottiez, E. A. Kuzin, B. Ibarra-Escamilla, and A. Barcelata Pinzón "Fiber laser strain sensor based in the measurement of a Sagnac interferometer optical power spectrum", Proc. SPIE 9098, Fiber Optic Sensors and Applications XI, 909817 (18 June 2014); https://doi.org/10.1117/12.2050781
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